Modify logging file handler path only when the file handler is enabled

Working on tpo/tpa/team#41379 (closed) to stop logging to files, i realized i needed to also change the function that changes the log path when disabling logging to file in the project settings.

Also tor logging level is currently hardcoded in defaults.py and there aren't project settings or cli argument to change it.

Finally, views.py is logging too much information at INFO level on every response